121031011123 has 16 divisors (see below), whose sum is σ = 139000256640. Its totient is φ = 104224276800.

The previous prime is 121031011109. The next prime is 121031011163. The reversal of 121031011123 is 321110130121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121031011123 - 2⁵ = 121031011091 is a prime.

It is a super-2 number, since 2×121031011123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121031011097 and 121031011106.

It is not an unprimeable number, because it can be changed into a prime (121031011163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1897063 + ... + 1959823.

It is an arithmetic number, because the mean of its divisors is an integer number (8687516040).

Almost surely, 2^121031011123 is an apocalyptic number.

121031011123 is a deficient number, since it is larger than the sum of its proper divisors (17969245517).

121031011123 is a wasteful number, since it uses less digits than its factorization.

121031011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72018.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121031011123 its reverse (321110130121), we get a palindrome (442141141244).

The spelling of 121031011123 in words is "one hundred twenty-one billion, thirty-one million, eleven thousand, one hundred twenty-three".